Geology as a Georegional Influence on Quercus Fagaceae Distribution in Denton and Coke Counties of Central and North Central Texas and Choctaw County of Southeastern Oklahoma, Using GIS as an Analytical Tool. Page: 51
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Distribution of Quercus in Coke, Denton and Choctaw Counties
Oaks are a member of the beech family and related to the chestnut. Nearly all
oaks can be placed in either the white or black oak group. Approximately 136 species
are identified worldwide; many oaks share multiple identities, and Table A10 lists 83.
There are estimated to be between 50 and 75 species in the United States, and 25 of
the 36 species found in Texas and Oklahoma can be found in Coke, Denton and
Choctaw Counties. Choctaw County, Oklahoma has 19 species while Denton and Coke
Counties have 13 and six respectively (Figures 3.4, 3.5, and 3.6) (Zim and Martin,
1956).
Figures 3.1 - 3.4 and 3.6 - 3.10, and their associated data tables, are used to
generate the frequency tables for the distribution of oaks on the soil orders and bedrock.
Statistical analyses are presented in chapter 4. Also the figures provide an excellent
visual portrayal of the patterns of oak distribution when the oak layer is overlain on
either the soil orders or bedrock geology. Definite patterns can be seen between the
siliceous formations and oak distributions. These patterns will be discussed further in
chapter 4.
In Choctaw County lowland oaks appear to be concentrated on the Woodbine
Sandstone, Antlers Sandstone and along the terraces and valleys carved by the
streams and rivers that incise the county. Upland oaks have two areas of
concentrations. Upland pine-hickory-cedar-oak associations are found on the Caddo,
and in the northeastern part of the county where the Mississippian age Jackfork inliers
on the Antlers Sandstone form rugged ridges. Upland oak-with-pine-hickory-cedar
associations are more heavily distributed on the Antlers Sandstone and in the51
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Maxey, George F. Geology as a Georegional Influence on Quercus Fagaceae Distribution in Denton and Coke Counties of Central and North Central Texas and Choctaw County of Southeastern Oklahoma, Using GIS as an Analytical Tool., dissertation, December 2007; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc5144/m1/61/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .